Tracking and determining orientation of object using coordinate transformation means, system and process
Apparatus for generating a nutating electromagnetic field
Remote object position locater
Helmet-mounted sighting system
Remote object position and orientation locater
Helmet metal mass compensation for helmet-mounted sighting system
Device applicable to direction finding for measuring the relative orientation of two bodies
Method and apparatus for determining remote object orientation and position
ApplicationNo. 210541 filed on 12/14/1998
US Classes:342/448, Having a coil or loop type antenna324/207.17Separate pick-up
ExaminersPrimary: Blum, Theodore M.
Attorney, Agent or Firm
Foreign Patent References
International ClassesH04B 007/185
Foreign Application Priority Data1997-12-12 IL
AbstractA method for determining the position and orientation of an object with respect to a reference frame, made up of providing the object with three independent transmitters of electromagnetic radiation, providing three independent receivers of the electromagnetic radiation, each of the receivers having a fixed position in the reference frame, transmitting the electromagnetic radiation, using the transmitters, a first of the transmitters transmitting the electromagnetic radiation including at least a first frequency, a second of the transmitters transmitting the electromagnetic radiation including at least a second frequency different from the first frequency, and a third of the transmitters transmitting the electromagnetic radiation including at least a third frequency different from the first frequency, receiving signals corresponding to the electromagnetic radiation, at all three of the receivers, at a plurality of times, each of the signals including components of at least one of the three frequencies, for each of the receivers, forming a first function of the components including the components of the signal received by the each receiver from the first transmitter at the first frequency, a function of the components including the components of the signal received by the each receiver from the second transmitter at the second frequency, and a function of the components including the components of the signal received by the each transmitter from the third transmitter at the third frequency, the functions being independent of a time delay between the transmitters and the receivers and inferring the position and the orientation of the object from the functions.